必要条件

Finally, the condition for the closed loop system to be exponentially stable is worked out by estimating the corresponding eigenfunctions.

最后通过对闭环系统的本征值及其相应的本征函数进行估计，导出了相应的闭环系统指数稳定的充分必要条件。

The rhyme scheme has played an important role in traditional Chinese poetry. But the role has been changed in modern Chinese poetry, which is no more the essential rule to evaluate modern poetry.

在中国传统诗学中，韵律一直是人们关注的话题，是作为诗歌文体构成的必要条件来看待的，甚至有无韵不成诗的观念，并以此作为探讨诗与文或者韵文与散文的文体差别的重要方面。

The scholars are the facilitators and should provide effective help for the development of teachers and schools.

参与者角色入位是合作研究的必要条件：教师是行动研究的主体，要具有自主发展的意识；学校需要为教师作研究提供组织、物质及文化的支持；学者是促进者，应该根据学校的发展目标，为教师和学校的发展提供切实有效的帮助。

The speeding up of the process of urbanization implies that there will be a lot of agricultural population changing into urban population. One necessary requirement is to provide a path to enter the social security system for those who are mainly engaged in non-agricultural industries but live in rural areas. However, due to the non-agricultural populations not participating in the social insurance system, it is hard for them to accumulate the insurance fund. Because of the dual urban and rural social security system, it is difficult for the social insurance to link up.

城市化进程的加快，意味着将有大量的农业人口转化为城市人口，其中的一个必要条件就是为非农化人口(主要从事着非农产业但户口在农村的人口)提供进入城市的社会保障制度通道，但由于有可能转变为市民的非农化人口在农村时没有参加社会保险，使其在城市参加社会保险时保险基金的累积和交费期受到一定制约；由于城乡的二元社会保障制度，使得由于人口流动所产生的社会保险的衔接出现困难。

This thesis is devoted to the study of 〓-type inequalities for martingales,such as the maximal inequalities,the inequalities for square functions,the inequali-ties for martingale transforms,the inequalities for singular integrals.

第三章证明了关于Hardy平均算子〓的双〓不等式、双〓凸引理，并通过考虑鞅的重排不等式，建立了鞅的双〓均方函数不等式、条件均方函数不等式，给出了这类不等式成立的一个充分必要条件。

The necessary condition for this set of modulations is presented and several different options satisfying the condition are given.

摘要为了更有效地提高系统的频带利用率，该文提出一种多调制方式联合的设计思想，并推导出其实现的必要条件和几种可能途径。

They all focus on the aesthetic of the product whether, in the designer's case, defined as a creative resolution of the joint demands of technology, price, or as the fulfillment of the requirements of taste, practicality and social and economic needs.

站在设计师的立场来看，他们都将注意力集中在产品的审学上，不管是对一个作为连接技术与价格需求的创造性决议的定义还是对作为履行品位性、实用性和社会及经济需求的必要条件的定义。

Essential condition for a high-End preamplifier, it is accompanied with proportional quality power supply.

完前置必要条件高，它是伴随着电力供应的质量成正比。

Recapitalisation is a necessary not sufficient condition for recovery, as the history of Japan shows.

就像日本的历史所显示的那样，资本重组是复苏的必要条件，而非充分条件。

Reductionists of whatever stripe are accustomed to arrive at surprising and far-reaching claims about the conditions for various phenomena: in holding that a given phenomenon reduces to such-and-such configuration of circumstances, they thereby portray those circumstances as necessary for that phenomenon.

各种还原论者习惯于获得关于各种现象的令人惊讶的、深远的主张：一个给予的现象，还原到如此这般环境构成，因此他们描绘这些环境作为现象的必要条件。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。